Optical scanning module with linear CMOS image

Abstract

An optical scanning module with linear CMOS image sensor (linear CMOSM) applied to scanners or multi-function printers is disclosed. The optical scanning module includes a light source for emitting light, a reflection mirror group, a focus lens group, and a linear CMOS image sensor having at least one linear CMOS image sensor unit and one A/D analog-digital converter. The light source can be a cold cathode fluorescent lamp (CCFL), a Xenon lamp or linear LED. Light emitted from the light source projects onto an object being scanned. Then the light reflected by the object being scanned becomes scanning light, passing through the reflection mirror group and the focus lens group and being focused on the linear CMOS image sensor for being converted into electrical signal. By A/D conversion of the linear CMOS image sensor unit in the linear CMOS image sensor, signal is sent out in USB or LVDS format so as to achieve high scanning speed, low distortion, large depth of focus and convenient transmission.

1 . An optical scanning module with a linear CMOS image sensor comprising
 a light source for emitting light onto the object being scanned to being scanning light;   a reflection mirror group that reflects the scanning light along predetermined optical path;   a focus lens group that focuses the scanning light from the reflection mirror group to form an image; and   a linear CMOS image sensor that converts the image into digital electrical signal and transmits the digital electrical signal in digital formats;   wherein the reflection mirror group comprising at least one reflection lens for reflection the scanning light along the predetermined optical path;   wherein the focus lens group comprising at least one optical lens that focuses the scanning light and correcting aberration of the scanning light;   wherein the linear CMOS image sensor comprising a linear CMOS image sensor unit, a timing generator unit, an A/D analog-digital converter and a transmission unit, integrated into a system on chip (SOC);   wherein the said linear CMOS image sensor unit converts the image into electrical signal;   wherein the timing generator unit is to generate timing signal for control of the linear CMOS image sensor unit;   wherein the A/D analog-digital converter converts electrical signal from the linear CMOS image sensor unit into digital signal;   wherein the transmission unit converts the digital signal from the A/D analog-digital converter into preset transmission formats for being transmitted.   
   
   
       2 . The optical scanning module as claimed in  claim 1 , wherein said light source is a cold cathode fluorescent lamp that emits light in a certain direction onto the object being scanned. 
   
   
       3 . The optical scanning module as claimed in  claim 1 , wherein said light source is a Xenon lamp that emits light in a certain direction onto the object being scanned. 
   
   
       4 . The optical scanning module as claimed in  claim 1 , wherein said light source is linear LED having at least one LED and the linear LED emits light in a certain direction onto the object being scanned. 
   
   
       5 . The optical scanning module as claimed in  claim 1 , wherein said digital format of the linear CMOS image sensor for signal transmission is AD format, LVDS format, USB format or combinations of them. 
   
   
       6 . The optical scanning module as claimed in  claim 1 , wherein said focus lens group further comprising an A/F (autofocus).zooming lens and an A/F controller; focus of the AF zooming lens is controlled by the AF controller so that scanning lights from different positions are adjusted into the same focal point and an image is formed on the linear CMOS image sensor unit. 
   
   
       7 . An optical scanning module with a linear CMOS image sensor comprising
 a light source for emitting light onto the object being scanned to being scanning light;   a reflection mirror group that reflects the scanning light along predetermined optical path;   a focus lens group that focuses the scanning light from the reflection mirror group to form an image; and   a linear CMOS image sensor that converts the image into digital electrical signal and transmits the digital electrical signal in digital formats;   wherein the reflection mirror group comprising at least one reflection lens for reflection the scanning light along the predetermined optical path;   wherein the focus lens group comprising at least one optical lens that focuses the scanning light and correcting aberration of the scanning light;   wherein the linear CMOS image sensor comprising a linear CMOS image sensor unit, an A/D analog-digital converter and a transmission unit, all integrated into a system on chip (SOC);   wherein the linear CMOS image sensor unit receives timing signal being input from externals and converts the image into electrical signal according to the timing signal;   wherein the A/D analog-digital converter converts electrical signal from the linear CMOS image sensor unit into digital signal;   wherein the transmission unit converts the digital signal from the A/D analog-digital converter into preset transmission formats for being transmitted.   
   
   
       8 . The optical scanning module as claimed in  claim 2 , wherein said light source is a cold cathode fluorescent lamp that emits light in a certain direction onto the object being scanned. 
   
   
       9 . The optical scanning module as claimed in  claim 2 , wherein said light source is a Xenon lamp that emits light in a certain direction onto the object being scanned. 
   
   
       10 . The optical scanning module as claimed in  claim 2 , wherein said light source is linear LED having at least one LED and the linear LED emits light in a certain direction onto the object being scanned. 
   
   
       11 . The optical scanning module as claimed in  claim 2 , wherein said digital format of the linear CMOS image sensor for signal transmission is AD format, LVDS format, USB format or combinations of them. 
   
   
       12 . The optical scanning module as claimed in  claim 2 , wherein said focus lens group further comprising an A/F (autofocus) zooming lens and an A/F controller; focus of the A/F zooming lens is controlled by the A/F controller so that scanning lights from different positions are adjusted into the same focal point and an image is formed on the linear CMOS image sensor unit.